Table 1. RIFLE criteria .

RIFLE: risk, injury, failure, loss, and end-stage; GFR: glomerular filtration rate

	GFR Criteria	Urine Output Criteria
RISK	Increased Cr Serum x 1.5 or GFR decreased > 25%	Urine output < 0.5 ml/kg/h x 6 hours
INJURY	Increased Cr Serum x 2.0 or GFR decreased > 50%	Urine output < 0.5 ml/kg/h x 12 hours
FAILURE	Increased Cr Serum x 3.0 or GFR decreased > 75% Or Cr Serum >4 mg/dl	Urine output < 0.3 ml/kg/h x 24 hours or anuria x 12 hours
LOSS	Persistent Acute Kidney Failure = Complete loss of kidney functions> 4 weeks
ESRD	End Stage Renal Disease (ESRD) Complete loss of kidney function> 3 months